Surface-modified semiconductor electrode, dye-sensitized solar cell, method of manufacturing the solar cell, and polymer composition used for the method

A semiconductor anode comprising:

• a metal oxide semiconductor formed on a conductive substrate;
• a dye formed on a surface of the metal oxide semiconductor;
• and
• a polymer self-assembled on a dye-free surface of the metal oxide semiconductor, wherein the metal oxide semiconductor is TiO2 and
• wherein the polymer comprises a repeating unit represented by formula 1 below:
• wherein,
• A is —O—;
• —NH—;
• alkyl, aryl, alkylaryl, or arylalkyl of 1-10 carbon atoms;
• or one selected from the group consisting of cyclic and noncyclic alkylenes, alkenylenes, arylenes, arylalkylenes, and alkylarylenes of 1-20 carbon atoms that are unsubstituted or substituted by a hetero atom selected from the group consisting of N, O, and S;
• B is hydrogen, halogen, nitrile, or one selected from the group consisting of alkyl, aryl, alkylaryl, and arylalkyl of 1-20 carbon atoms;
• R1 is a bond, or one selected from the group consisting of alkylenes, arylenes, arylalkylenes, and alkylarylenes of 1-20 carbon atoms that are unsubstituted or substituted by a hetero atom selected from the group consisting of N, O and S;
• X is selected from the group consisting of —OH, —SH, —COOH, —CONH2 , —OCOR, —OCOCF3, —SCOR, —CH7SH, —CH2SCN, —SH2SCOCH3, —COOR, —Si(OMe)3, —Si(OEO3, —COCH═CH2 , —OCOCH═CH2, —CH2O(PEG)dOCH3, —CH2 Cl, —CH2OCOCCl3, and —CH═CH2 where R is alkyl, aryl, alkylaryl, or arylalkyl of 1-20 carbon atoms, PEG is polyethyleneglycol, d is PEG having a molecular weight of 200 to 10,000, Me is a methyl group, and Et is an ethyl group;
• n is 2 to 10,000;
• and
• the repeating unit may be a combination of 2 to 10 different repeating units.